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Texas Instruments LM63615DQDRRRQ1
- Part No.:
- LM63615DQDRRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LM63615DQDRRRQ1.pdf
- Description:
- IC REG BUCK ADJ 1.5A 12WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,792
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Product details
Overview
LM63615DQDRRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 1.5A output current across 3.5V–36V input, with fixed 3.3V/5V or adjustable 1V–20V output, 250kHz–2200kHz selectable switching frequency, and 23µA quiescent current - deployed in infotainment power rails and ADAS camera modules.
For engineers reviewing the LM63615DQDRRRQ1 datasheet, LM63615DQDRRRQ1 pinout, LM63615DQDRRRQ1 application, or LM63615DQDRRRQ1 equivalent, key selection factors include its WSON-12 thermally enhanced package, pin-selectable FPWM/AUTO/sync modes, RESET flag for system sequencing, and integrated high-side/low-side MOSFETs with 93mΩ/61mΩ RDS(on).
Technical Context
The LM63615DQDRRRQ1 implements peak-current-mode control with automatic PFM/PWM mode transition: PWM at full load (fixed fSW), diode-emulation PFM at light load to maintain >85% efficiency down to 1mA. It integrates internal compensation, precision enable (1.425V–1.575V threshold), and hiccup-mode short-circuit protection triggered after 128 overcurrent cycles.
Its thermal design centers on the WSON-12 PowerPAD™ package (3mm × 3mm), achieving 47.4°C/W junction-to-ambient resistance and 6.3°C/W junction-to-case (bottom) resistance. The device supports CISPR 25-compliant EMI performance via pseudo-random spread spectrum (±5% depth, 0.98Hz pattern) and 50ns minimum on-time for high VIN/VOUT ratios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports cold-crank (4.5V) and load-dump (36V) transients in 12V/24V automotive systems. |
| Output Current | 1.5A continuous - sufficient for powering SoCs, image sensors, and CAN transceivers in body electronics. |
| Quiescent Current | 23µA - enables always-on functionality in gateway ECUs without excessive battery drain. |
| Switching Frequency | 250kHz to 2200kHz - selectable via RT resistor; 2.1MHz operation allows <10mm² solution size with small inductors. |
| Output Voltage Options | 3.3V or 5V fixed (via VSEL pin), or 1V–20V adjustable - eliminates external feedback resistors for common rail voltages. |
| Protection Features | Thermal shutdown (155°C trip), hiccup short-circuit, cycle-by-cycle current limit, and UVLO (3.5V rising) - ensures robust operation in under-hood environments. |
| EMI Performance | CISPR 25 Class 5 compliant with spread spectrum - reduces peak radiated emissions without external filters. |
Pinout & Package
LM63615DQDRRRQ1 uses the DRR (WSON-12) package: 3mm × 3mm body with exposed thermal pad (DAP) soldered to PCB ground plane for optimal heat dissipation and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 12 | PGND/DAP | Power ground and thermal interface - must be connected to large copper area for <150°C junction temperature at 1.5A. |
| 3 | EN | Enable input with precision 1.425V–1.575V turn-on threshold - supports direct connection to microcontroller GPIO or ignition-sense circuitry. |
| 4 | CBOOT | Bootstrap supply node - requires 220nF ceramic capacitor to SW for high-side gate drive; critical for stable 93mΩ RDS(on) operation. |
| 5 | VCC | Internal 5V LDO output - powers control logic; decoupled with 1µF capacitor to PGND; not for external loading. |
| 6 | FB | Feedback input referenced to 1.0V internal reference - connects to output capacitor (fixed) or external divider (adjustable) for ±1.5% VOUT accuracy. |
| 7 | RT | Frequency programming node - tied to AGND for 2.1MHz, VCC for 400kHz, or resistor for 250–2200kHz tuning. |
| 8 | VSEL | Output voltage select - AGND = 3.3V, VCC = 5V, 10kΩ-to-AGND = adjustable - sets FB regulation point before startup. |
| 9 | SYNC/MODE | Mode control - AGND = AUTO (PFM/PWM), VCC = FPWM, external clock = synchronized - enables multi-rail timing coordination. |
| 10 | RESET | Open-drain power-good flag - asserts low when VOUT deviates >7% from target; used for processor reset sequencing. |
| 11 | VIN | Main input supply - requires local 220nF bypass within 1mm of pin and PGND to suppress switch-node ringing. |
| SW | Switch node | Connection to power inductor - carries high di/dt; layout dictates EMI and efficiency; ties to CBOOT capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive cabin and engine-bay thermal requirements. |
| Integrated high- and low-side MOSFETs | 93mΩ HS / 61mΩ LS RDS(on) - eliminates external FETs and drivers, reducing BOM count and layout complexity. |
| Precision enable with hysteresis | 1.425V–1.575V turn-on window - prevents erratic startup during slow-rising battery rails in start-stop systems. |
| RESET flag with 2ms delay | 110–115% upper / 91–95% lower FB threshold - provides clean power-good assertion after soft-start completion. |
| Thermally enhanced WSON-12 | 6.3°C/W junction-to-case (bottom) resistance - enables 1.5A operation at +85°C ambient without heatsink. |
Applications
| Automotive Infotainment Power Supply | ADAS Camera Module Rail |
|---|---|
|
Use Scenario: Powers display controller, audio DSP, and USB hub in head-unit with variable load (10mA–1.2A). IC Role / Device Role / Timing Role: Primary 5V buck regulator with AUTO mode for dynamic efficiency scaling and RESET for SoC reset coordination. Use Value: 23µA quiescent current extends battery life during vehicle sleep; 2.1MHz switching enables compact 2.2µH inductor and 10mm × 10mm PCB footprint. |
Use Scenario: Supplies 3.3V to CMOS image sensor and ISP in forward-facing camera with strict EMI limits. IC Role / Device Role / Timing Role: Fixed 3.3V converter with spread spectrum and CISPR 25 compliance for EMC certification. Use Value: ±5% frequency dither reduces radiated emissions peaks by 10dB; 50ns min on-time supports 3.3V output from 12V battery during cold crank. |
| Body Control Module Core Rail | Automotive Gateway Microcontroller Supply |
|
Use Scenario: Generates 3.3V for MCU, LIN transceivers, and LED drivers in door module with intermittent loads. IC Role / Device Role / Timing Role: Adjustable VOUT configuration with external feedback for future-proof voltage scaling. Use Value: Pin-selectable VSEL and RT allow hardware-programmed variants without firmware changes; 1.5A headroom supports added peripherals. |
Use Scenario: Provides always-on 5V rail for network management MCU in vehicle gateway with wake-on-CAN capability. IC Role / Device Role / Timing Role: Low-IQ buck with precision enable enabling controlled wake-up from deep sleep states. Use Value: 23µA IQ keeps total gateway sleep current below 50µA; EN threshold hysteresis prevents false wake-ups from noisy battery lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM63625DQDRRRQ1 | 2.5A rated output current; identical pinout and feature set - higher current capability with same footprint. | Suitable for higher-power ADAS radar modules or infotainment processors requiring >1.5A. | Select when load current exceeds 1.5A; no PCB change required due to pin compatibility. |
| LM63610DQPWPRQ1 | HTSSOP-16 package (5mm × 4mm); 1.5A rating; same electrical specs but larger thermal pad area and different pin arrangement. | Better thermal performance in constrained airflow environments; suited for under-dash modules with limited board space height. | Choose when thermal margin is critical and board area permits larger package; requires layout revision. |
Compared with LM63615DQDRRRQ1, the LM63625DQDRRRQ1 offers +1A output headroom in the same WSON-12 footprint, while the LM63610DQPWPRQ1 trades compactness for superior thermal resistance (43.1°C/W vs. 47.4°C/W) in HTSSOP packaging - enabling higher sustained loads in thermally demanding locations.
Availability
LM63615DQDRRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control unit designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM63615DQDRRRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of automotive-grade product development and AEC-Q100 validation expertise.
The LM636x5-Q1 product line delivers highly integrated, thermally optimized DC/DC converters for automotive subsystems where reliability, EMI control, and wide input range are mandatory - targeting infotainment, ADAS, and body electronics.
FAQ
What is the maximum ambient temperature for continuous 1.5A operation of the LM63615DQDRRRQ1?
The LM63615DQDRRRQ1 supports continuous 1.5A output at +85°C ambient temperature when using the WSON-12 package with proper PCB copper pour on the DAP thermal pad. Its junction temperature remains below 150°C under these conditions, validated per AEC-Q100 Grade 1 requirements. Derating is required above this ambient level - consult the thermal curves in Section 6.4 of the LM63615DQDRRRQ1 datasheet for precise derating guidance.
Does the LM63615DQDRRRQ1 require external compensation components?
No, the LM63615DQDRRRQ1 features fully internal compensation - no external Type II or Type III compensation network is needed. This simplifies design, reduces component count, and improves stability across all operating conditions. The internal loop is optimized for standard output capacitors (e.g., 22µF–47µF ceramic) and inductors (1.0µH–2.2µH), as verified in the typical application circuits of the LM63615DQDRRRQ1 datasheet.
How does the RESET pin of the LM63615DQDRRRQ1 behave during startup and fault conditions?
The LM63615DQDRRRQ1 RESET pin is an open-drain output that remains low until VOUT reaches 110–115% of the target voltage and remains stable for ≥2ms (tRISE-DELAY). It pulls low again if VOUT falls below 91–95% of target or if EN is deasserted. During hiccup-mode short-circuit events, RESET stays low until recovery. This behavior enables reliable power sequencing for downstream MCUs and FPGAs in automotive systems.
Can the LM63615DQDRRRQ1 operate with a 400kHz switching frequency, and how is it configured?
Yes, the LM63615DQDRRRQ1 supports 400kHz operation by connecting the RT pin to VCC. This configuration is explicitly listed in the Device Comparison Table and confirmed in Section 7.3.3 of the LM63615DQDRRRQ1 datasheet. At 400kHz, the converter achieves higher efficiency at medium loads and reduced EMI compared to 2.1MHz, making it ideal for noise-sensitive analog subsystems like audio amplifiers or sensor signal chains.
Is the LM63615DQDRRRQ1 pin-compatible with other members of the LM636x5-Q1 family?
Yes, the LM63615DQDRRRQ1 shares identical pinout and footprint with the LM63625DQDRRRQ1 (2.5A version) in the WSON-12 (DRR) package. This allows direct substitution for higher-current needs without PCB redesign. However, it is not pin-compatible with the HTSSOP-16 variants (e.g., LM63615DQPWPRQ1), which have different pin assignments and thermal pad geometry despite sharing functional equivalence.
LM63615DQDRRRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 20V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 250kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-WSON (3x3)
LM63615DQDRRRQ1 FAQ
1.How can I place an order for LM63615DQDRRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM63615DQDRRRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM63615DQDRRRQ1 reliable?
The price and inventory of LM63615DQDRRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM63615DQDRRRQ1 is usually 5 days.
3.What payment methods are accepted for LM63615DQDRRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM63615DQDRRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM63615DQDRRRQ1?
LM63615DQDRRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM63615DQDRRRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM63615DQDRRRQ1?
For technical support, including LM63615DQDRRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM63615DQDRRRQ1 requirements.
6.How does Aetrix verify that LM63615DQDRRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM63615DQDRRRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM63615DQDRRRQ1 meets industry standards.
7.What is the process for return or replacement of LM63615DQDRRRQ1?
All LM63615DQDRRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM63615DQDRRRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM63615DQDRRRQ1 part is unused and in its original packaging.
Return procedure for LM63615DQDRRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM63615DQDRRRQ1 Tags
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